Improvement in insulators for telegraph-wires



L. A. GAUVET. INSULATOR FOR TELEGRAPH WIRES.

Patented July 25, 1865.

7/ /0esses I I hereueor PATENT Genres.

tours A. CAUVET, or new rose, a. Y.

IMPROVEMENT IN INSULATGRS FOR TELEGRAPl-l-WERES.

Specification forming part of Letters Patent No. 48,906, dated July 25, 1805.

To all whom it may concern:

Be it known that I, LOUIS A. Oaovn'r, of No. 75:} New street, in the city, county, and State of New York, have invented a new and useful Improvement in Insulators for Telegraphic Wires; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being bad to the accompanying drawings, forming a part of this specification, in which- Figure 1 represents twoinsulators constructed after my invention arranged in a horizontal position upon a telegraphic pole, one of said insulators beingshownin section. Fig. 2 shows another mode of arranging said insulators on a pole.

Similar letters of reference indicate like parts.

This invention consists in constructing glass insulators for use on telegraph-poles in such a way as that they can be secured to thepoles in any position without the use of metallic or other attachments.

A, Fig. 1, represents a pole erected to sustain alinc of telegraph-wire.

B is a wooden rod, upon each end of which a screw-thread, c, is cut.

0 is a collar left on therod when it is turned out.

The post A is perforated near its top to receive the rod B, which is passed through it until the collar 0 abuts against the side of the post.

The rod is secured to the post by means of the nut 1), which is tightened against that side of the post which is opposite to the collar.

The insulator J is made of glass molded to any suitable shape as to its exterior, but having always one or more grooves, f, formed on its circumference, to enable a conductingwire to be wound about it.

The base or broad part g of the insulator-is here shown to be a plane surface near its edge, with a recess about its center. I propose also to form the base g. of a convex shape, instead of partly flat or plane and partly sunken. When it is made convex itwill shed rain with more facility, especially when my insulators i are fixed vertically, as shown in Fig. 2, the

lower ones having their bases turned upward.

My insulator is made of glass, molded according to the art of the glass-moldcr, with a hole partly through it in the line of its axis, a screw-thread being formed in said hole in the process of molding. I do not here claim an improvement in the art of molding glass but the subject of my invention in this application is in the insulator made as aforesaid.

The insulator having been molded to the desired form, with an internal scrcwthread formed in an axial perforation, as above explained, it is screwed upon one of the ends of the rod Bpvhcre it is retained by means of the articulation of the screw-threads.

When the rod ispassed through the pole, as shown in Fig.1,two insulators can be secured in horizontal positions.

In cases where it is desired to sustain several wires upon the same pole at nearly the same elevations, i secure a rod, B, at or near each end of a cross bar, A, which is then to be bolted to the post A. More than two bars 1 may, if desired, be secured upon the crossbar A.

My improvement in insulators enables me to atlix and secu e them upon bars and pinswith the use of their screw-threads alone, by means of which they are sustained upon telegraphpolcs by simply screwing them upon threads formed upon such bars or pins, and thereby to avoid the use of cement and i'astcnings of metallic hooks or wire, wherewith insulators have hitherto been fastened to their hearingpins.

Havingthns described my invention, I claim as new and desire to secure by Letters Patent- Constructing glass insulators for telegraphwires with an internal screw-thread, and securing them thereby to the bearings, bars, or pins of telegraph-posts,substantially as above set forth.

LOUIS A. CAUVET.

Witnesses:

J. P. HALL, M. M. Lrvrnosron. 

